{
   "$schema":"http://json-schema.org/draft-03/schema#",
   "id":"http://schemas.opengis.net/gsr/1.0/color.json",

    "title":"domain",
    "type":["null","array"],
    "minItems":4,
    "maxItems":4,
    "description":"[ <red>, <green>, <blue>, <alpha> ]",
    "items":{
        "type":"integer",
        "minimum":0,
        "maximum":255
    }
}
